scholarly journals SELF-TUNING FUZZY SPEED CONTROLLER OF TRAVELLING WAVE ULTRASONIC MOTOR

2014 ◽  
Vol 7 (1) ◽  
pp. 301-320 ◽  
Author(s):  
Jingzhuo Shi ◽  
Juanping Zhao ◽  
Zhe Cao ◽  
Yunpeng Liang ◽  
Lan Yuan ◽  
...  
Keyword(s):  
Travelling Wave ◽  
Ultrasonic Motor ◽  
Speed Controller ◽  
Self Tuning

Start Control of Ultrasonic Motor Based on Neural Network

2011 ◽  
Vol 383-390 ◽  
pp. 1623-1628
Author(s):  
Hui Min Zhang ◽  
Hai Yan Wang ◽  
Jing Zhuo Shi ◽  
Xun Liu
Keyword(s):  
Neural Network ◽  
Traveling Wave ◽  
High Speed ◽  
Control Algorithm ◽  
Ultrasonic Motor ◽  
Tuning Parameters ◽  
Speed Controller ◽  
Self Tuning ◽  
On Line

It is very hard for the traveling wave ultrasonic motor to start directly with high speed, because of their special running mechanism and the unique features. To solve this problem and realize the uitrasonic motor’s high-speed start control, speed controller with on-line self-tuning parameters is designed. Neural network is used to realize the online adjustment of controller’s parameters, to agree with the different starting request of different speed references, and make best use of motor’s ability. The experiments indicated that the motor start fast and accurately, the control algorithm is effective and reliable.

Compound Speed Control of Ultrasonic Motor Using Two Variables

2011 ◽  
Vol 383-390 ◽  
pp. 6025-6030 ◽  
Author(s):  
Hai Yan Wang ◽  
Jing Zhuo Shi ◽  
Ke Gao
Keyword(s):  
Control Strategy ◽  
Speed Control ◽  
Travelling Wave ◽  
Ultrasonic Motor ◽  
Fine Tuning ◽  
Voltage Amplitude ◽  
Speed Controller ◽  
Speed Error ◽  
Control Response ◽  
Speed Response

In order to obtain more stable speed response, this paper designs a compound speed controller for travelling wave ultrasonic motor. The controller uses two variables, frequency and voltage amplitude, as the controlled variables. Among them, the frequency controller finishes the correction of larger speed error, and the voltage amplitude controller is used to accomplish the fine-tuning of speed error. The problems such as the jumping phenomenon in speed response, and saturation of voltage amplitude, are solved by this control strategy. Experiments show that, the control strategy is effective, and the speed control response is good.

scholarly journals Self-Tuning Speed Controller of the Induction Motor Drive

2014 ◽  
Vol 20 (6) ◽  
Author(s):  
J. Kriauciunas ◽  
R. Rinkeviciene ◽  
A. Baskys
Keyword(s):  
Induction Motor ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Speed Controller ◽  
Self Tuning

Modelling the radially polarised annular stator of a piezoelectric travelling wave ultrasonic motor based on the shear effect

2019 ◽  
Vol 30 (8) ◽  
pp. 1225-1238 ◽  
Author(s):  
Ana Costa Conrado
Keyword(s):  
Travelling Waves ◽  
Travelling Wave ◽  
Ultrasonic Motor ◽  
Free Vibrations ◽  
Mindlin Plate ◽  
Vibration Modes ◽  
Shear Effect ◽  
Plate Model ◽  
Voltage Inverter ◽  
Contact Points

This article deals with the mathematical–analytical model of a radially polarised stator, part of a piezoelectric travelling wave ultrasonic motor based on the shear effect. The stator is treated with a Reissner–Mindlin plate model containing piezoelectric terms. The so-obtained mathematical description of the disc stator takes into account its geometry, kinematics and characteristics that influence efficiency and torque. Rayleigh–Ritz discretisation is used to obtain eigenfrequencies and eigenmodes of the stator plate. In addition, there are often teeth over the contact surface of ring-shaped stators to minimise the friction losses during operation of the motor, and possible vibration modes are compared with respect to the deflexion of the contact points. In the laboratory, measured eigenfrequencies of the free vibrations of the plate corroborate the numerical method. Particularly, the generation of travelling waves requests the excitation of two degenerated vibration modes in a certain electrode configuration. A voltage inverter was designed for this purpose.

scholarly journals Heat Energy Modelling of Travelling Wave Piezoceramic Ultrasonic Motor

2018 ◽  
Vol 225 ◽  
pp. 01009
Author(s):  
Mohd Fathuddin Mohd Sunif ◽  
Mohd Noor Firdaus Haron ◽  
Fadhlur Rahman Mohd Romlay
Keyword(s):  
Finite Element Method ◽  
Transient Analysis ◽  
Variable Temperature ◽  
Piezoelectric Element ◽  
Travelling Wave ◽  
Ultrasonic Motor ◽  
Heat Energy ◽  
Heat Distribution ◽  
Energy Modelling ◽  
Operation Frequency

This paper presents the method of determining and characterizing of a piezoelectric stator profile that applying in a piezoceramic ultrasonic motor with the consideration of heat generated. The piezoceramic ultrasonic motor is driven by the vibration of the piezoelectric element in order to ignite a motion. The harmonic and transient analysis of finite element method are used to predict the optimise operation frequency of the motor travelling wave. Then, a thermal analysis is conducted in order to analyse the heat distribution on the stator. The stator profile displacements with the variable temperature; 300, 360 and 450 K are analysed. The piezoceramic ultrasonic motor shows different longitudinal deflection with the increment of the temperature. Travelling wave optimization was found to be strongly dependent on the heat that generated by the piezoceramic.

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